/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.iec.edp.caf.middleware.spi.impl;

import io.iec.edp.caf.app.manager.classloader.CAFClassLoader;
import io.iec.edp.caf.middleware.spi.ClassUrlResolver;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.loader.LaunchedURLClassLoader;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

/**
 * 非并行启动
 */
@Slf4j
public class DefaultClassUrlResolver implements ClassUrlResolver {
    @Override
   public String getId(){
       return "0";
   }

    @Override
    public void addUrl(ClassLoader cl, URL[] urls){
        //非并行启动时，将URL加入CAFClassLoader的父中
        CAFClassLoader cafClassLoader = (CAFClassLoader)cl;
        this.addUrls((LaunchedURLClassLoader)cafClassLoader.getParent(),urls);
    }

    private void addUrls(LaunchedURLClassLoader launchedURLClassLoader, URL[] urls) {
        try {
            Method addUrlMethod = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
            addUrlMethod.setAccessible(true);
            for (URL url : urls) {
                addUrlMethod.invoke(launchedURLClassLoader, url);
            }
        } catch (IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
            log.error("Failed add new URL into URLClassLoader.", e);
        }
    }
}
